<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 卡片视图区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbotton', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <!-- 通过 for 循环嵌套渲染二级权限 -->
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{
                      item2.authName
                    }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{ scope.row }}</pre> -->
          </template>
        </el-table-column>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditRoleById(scope.row.id)"
              >编辑</el-button
            >

            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >

            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色对话框 -->
    <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 内容主体区 -->
      <span>
        <el-form :model="addRoleForm" :rules="addRoleFormRules" ref="addRoleFormRef" label-width="80px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addRoleForm.roleName"></el-input>
          </el-form-item>

          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addRoleForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
      </span>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改用户对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <span>
        <el-form :model="editRoleForm" :rules="editFormRoleRules" ref="editRoleFormRef" label-width="80px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editRoleForm.roleName"></el-input>
          </el-form-item>

          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editRoleForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
      </span>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClose">
      <!-- 树形控件 show-checkbox选择框 node-key选择框可以单选 
      default-expand-all展示所有树状结构 :default-checked-keys显示已勾选选择框-->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 角色列表
      rolesList: [],
      // 控制分配权限对话框
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children',
      },
      // 默认选中节点id值数组
      defKeys: [],
      // 当前即将分配角色的id
      roleId: '',

      // 添加角色对象
      addRoleForm: {
        roleName: '',
        roleDesc: '',
      },
      // 添加角色对话框的展示与否
      addDialogVisible: false,
      // 添加角色验证规则
      addRoleFormRules: {
        roleName: [
          { required: true, message: '请输角色名', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
      },

      // 修改角色对象
      editRoleForm: {},
      // 修改角色对话框的展示与否
      editDialogVisible: false,
      // 修改角色验证规则
      editFormRoleRules: {
        roleName: [
          { required: true, message: '请输角色名', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },

  created() {
    this.getRolesList()
  },

  methods: {
    // 获取角色列表函数
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolesList = res.data
      console.log(this.rolesList)
    },

    // 监听添加角色对话框, 关闭重置
    addDialogClosed() {
      this.$refs.addRoleFormRef.resetFields()
    },

    // 点击添加新用户
    addRole() {
      // 验证表单数据
      this.$refs.addRoleFormRef.validate(async (valid) => {
        if (!valid) return

        // 发起请求
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败')
        }
        this.$message.success('添加角色成功')
        this.addDialogVisible = false
        this.getRolesList()
      })
    },

    // 删除角色按钮点击事件
    async removeRoleById(id) {
      // 弹框询问是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
      }).catch((err) => err) // 捕获取消错误cancel
      // 确定返回字符串 confirm
      // 取消返回字符串 cancel
      console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除')
      }
      // 发起删除请求
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败！')
      }
      this.$message.success('删除角色成功！')
      this.getRolesList()
    },

    // 监听修改角色对话框, 关闭重置
    editDialogClosed() {
      this.$refs.editRoleFormRef.resetFields()
    },
    // 展示修改角色对话框
    async showEditRoleById(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败')
      }
      this.editRoleForm = res.data
      console.log(res.data)
      this.editDialogVisible = true
    },
    // 修改角色按钮点击事件
    async editRoleInfo() {
      // 验证表单数据
      this.$refs.editRoleFormRef.validate(async (valid) => {
        if (!valid) return
        // 发起请求
        const { data: res } = await this.$http.put('roles/' + this.editRoleForm.roleId, {
          roleName: this.editRoleForm.roleName,
          roleDesc: this.editRoleForm.roleDesc,
        })
        //console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('修改角色信息失败')
        }
        this.editDialogVisible = false
        this.getRolesList()
        this.$message.success('修改角色信息成功')
      })
    },
    
    // 根据id删除对应权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
      }).catch((err) => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除')
      }

      // console.log('确认删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      // this.getRolesList() 调用该函数会使张开列合上重新加载
      role.children = res.data //该接口返回数据是最新权限列表
    },

    // 展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限失败!')
      }

      // 把获取的数据保存到 data 中
      this.rightsList = res.data
      console.log(this.rightsList)

      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },

    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach((item) => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听分配权限对话框关闭事件
    setRightDialogClose() {
      this.defKeys = []
    },

    // 点击确定为角色分配权限
    async allotRights() {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      console.log(keys)

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbotton {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>